The near-field acoustic holography experimental research based on the second-order cyclic statistics

PDF(1704 KB)

Journal of Vibration and Shock ›› 2011, Vol. 30 ›› Issue (9) : 202-206.

论文

The near-field acoustic holography experimental research based on the second-order cyclic statistics

Chen Zhi-min1; Zhu Hai-chao1; Kuang Gong-xian2

Author information +

History +

Abstract

The conventional near-field acoustic holography technology can not mirror exactly modulation characteristics of cyclostationary sound field through the reconstructed results. So the demodulation ability of the cyclic autocorrelation function was used to extract the feature cyclic frequency, the cyclic spectrum density (CSD) was obtained through the cyclic Wiener-Khinchin relation, and the CSD was adopted as reconstructed physical quantity in planar near-field acoustic holography instead of the spectrum of pressure. The experiment research show that the feature frequence of cyclostationary sound field can be extracted exactly and its essential characteristics can be observed directly from the reconstructed results.

Key words

cyclic autocorrelation function / cyclic spectrum density / feature extraction / near-field acoustic holography

Cite this article

EndNote

Ris (Procite)

Bibtex

Download Citations

Chen Zhi-min;Zhu Hai-chao;Kuang Gong-xian. The near-field acoustic holography experimental research based on the second-order cyclic statistics[J]. Journal of Vibration and Shock, 2011, 30(9): 202-206